CN111657032B - 一种油茶根部嫁接繁殖方法 - Google Patents

一种油茶根部嫁接繁殖方法 Download PDF

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CN111657032B
CN111657032B CN202010372448.1A CN202010372448A CN111657032B CN 111657032 B CN111657032 B CN 111657032B CN 202010372448 A CN202010372448 A CN 202010372448A CN 111657032 B CN111657032 B CN 111657032B
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李必琼
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Yidianyuan Camellia Oleifera Planting Professional Cooperative In Yu'an District Of Lu'an City
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Abstract

本发明公开一种油茶根部嫁接繁殖方法,包括以下步骤:S1:砧根的采集与处理;S2:接穗的采集;S3:接穗的处理:在接穗叶芽下端两侧处削成斜度为25~30°、长1.6~2.0cm平滑的楔形斜面,再将接穗削面置于生长营养液中,25℃黑暗条件下培养;所述生长营养液配方为:1/2 MS液体培养基+6‑BA 1.2~2.0mg/L+IAA 0.25~0.5mg/L+KT 2.5~4mg/L+创伤酸2.0~3.5mg/L+阿魏酸钠5.0~8.0 mg/L+苦参碱0.05~0.08g/L+白砂糖25g/L;S4:嫁接与育苗;S5:移栽。相比于油茶苗杆,油茶根部的皮较厚且较有韧性,更易嫁接,由于油茶侧根嫁接,在嫁接苗生长过程中,显著抑制了砧木萌芽抽枝现象,无需除萌,大大降低了农户工作量,且根接法低位置抽枝,株型更自然美观,嫁接成活率高,生长速度快。

Description

一种油茶根部嫁接繁殖方法
技术领域
本发明属于油茶无性繁殖技术领域,具体涉及一种油茶根部嫁接繁殖方法。
背景技术
油茶,属于山茶科,常绿中小乔木,又名茶子树、茶油树、白花茶。油茶果可榨成茶油供食用,茶油色清味香,营养丰富,耐贮藏,是一种优质食用油的,也可作为润滑油、防锈油等。油茶树是世界四大木本油料之一,生长在我国南方亚热带地区的高山及丘陵地带,是我国特有的一种纯天然高级油料。
嫁接繁殖是用植物营养器官的一部分,移接于具有一定亲缘性的另一株植物体上,在结合处的形成层产生愈合现象,使导管、筛管互通,以形成一个新个体的无性繁殖方法。目前,油茶嫁接的主要方式为苗木主干插皮嫁接,油茶杆的皮较薄,不易嫁接,同时,随着嫁接苗的不断生长,砧木部分也会吸收营养物质不断萌芽抽枝,进而影响嫁接苗接穗部位的生长,因此,除萌是传统油茶嫁接方法的必要环节之一,费时费力,此外,传统油茶嫁接的嫁接口明显、位置较高,影响油茶苗的美观。
发明内容
针对现有技术的不足之处,本发明的目的在于提供一种油茶根部嫁接繁殖方法。
本发明的技术方案概述如下:
一种油茶根部嫁接繁殖方法,包括以下步骤:
S1:砧根的采集与处理:2~3月,采挖并截取直径为0.8~1.2cm、长度10~15cm的1~2年生油茶侧根作为嫁接砧木,清洗干净,置于生根营养液浸渍处理6~12h后,从截面沿髓心向下纵切2~3cm;
所述生根营养液配方为:1/2 MS液体培养基+6-BA 0.4~0.6mg/L +IAA 0.8~1.2mg/L +NAA 0.5~0.8 mg/L;
S2:接穗的采集:剪取10~20年生、丰产稳产、抗逆性强油茶母树树冠外围中上部长势良好、腋芽饱满、直径为0.3~0.4cm、健康的当年生半木质化春梢,并修剪成一芽半叶接穗,芽距离接穗顶部0.4~0.5 cm;
S3:接穗的处理:在接穗叶芽下端两侧处削成斜度为25~30°、长1.6~2.0cm平滑的楔形斜面,再将接穗削面置于生长营养液中,25℃黑暗条件下培养;
所述生长营养液配方为:1/2 MS液体培养基+6-BA 1.2~2.0mg/L +IAA 0.25~0.5mg/L +KT 2.5~4mg/L +创伤酸2.0~3.5mg/L +阿魏酸钠 5.0~8.0 mg/L +苦参碱0.05~0.08g/L +白砂糖25g/L;
S4:嫁接与育苗:将处理后接穗削面插入砧根切口中,与砧根形成层紧密贴合,包扎密封接口处,在温棚内种植根接苗,保持嫁接口在育苗基质上面,定期浇水,及时除草,每月按80~110g/株的用量追施一次三元复合肥;
S5:移栽:当接芽萌动至抽出枝梢5~6cm时,移栽苗圃地。
优选的是,所述温棚内温度为15~25℃、透光度为45~60%、相对湿度为90~95%。
优选的是,所述育苗基质由以下质量份原料于38℃堆肥发酵30d而成:沙壤土200份、蚕沙5~7份、麦秸30~45份、油茶壳灰10~15份、油茶饼粕10~15份、甘蔗渣8~12份、菌渣5~10份、骨粉5~10份、禽畜粪便25~30份、功能性微生物菌剂1~1.5份。
优选的是,所述功能性微生物菌剂由酿酒酵母菌、哈茨木霉菌T-22、苏云金杆菌、枯草芽孢杆菌按3:2:1.5:1.5的质量比混合而成。
优选的是,所述三元复合肥中N的质量分数为20~25%、P2O5的质量分数10~12%、K2O的质量分数为15~17%。
本发明的有益效果:
1、相比于油茶苗杆,油茶根部的皮较厚且较有韧性,更易嫁接,由于油茶侧根嫁接,在嫁接苗生长过程中,显著抑制了砧木萌芽抽枝现象,无需除萌,大大降低了农户工作量,且根接法低位置抽枝,株型更自然美观,嫁接成活率高,生长速度快。
2、本发明采用生根营养液对砧根进行预处理,采用生长营养液对接穗进行诱导培养,提高接穗和砧根的愈合能力,提高根接苗的分化、萌芽生根能力,进而提高嫁接成活率。其中,创伤酸学名2-十二碳烯二酸,刺激砧根和接穗的形成层细胞分裂,促进愈伤组织形成,加速嫁接伤口愈合,同时与6-BA、IAA、KT协同促进接芽萌发生长,阿魏酸是一种广泛存在于植物中的酚酸,与多糖和蛋白质结合成细胞壁的骨架,促进油茶组织和细胞的生长,同时,阿魏酸钠具有极强的抗氧化性,能防止接穗氧化褐变,苦参碱作为生物碱,提高油茶接穗的抗病毒抗虫害能力。
3、本发明利用哈茨木霉菌T-22、苏云金杆菌、枯草芽孢杆菌等复配的功能性微生物菌剂发酵育苗基质,使之具有药肥两用的功效,在不使用农药及抗生素的情况下,显著提高油茶的抗病虫害能力和嫁接成活率,实现生态绿色种植理念。
具体实施方式
下面结合实施例对本发明做进一步的详细说明,以令本领域技术人员参照说明书文字能够据以实施。
实施例1
一种油茶根部嫁接繁殖方法,包括以下步骤:
S1:砧根的采集与处理:2月10号,采挖并截取直径为0.8~1.2cm、长度10~15cm的1~2年生油茶侧根作为嫁接砧木,清洗干净,置于生根营养液浸渍处理6~12h后,从截面沿髓心向下纵切2~3cm;
所述生根营养液配方为:1/2 MS液体培养基+6-BA 0.5mg/L +IAA 1.0mg/L +NAA0.6 mg/L;
S2:接穗的采集:剪取15年生、丰产稳产、抗逆性强的赣石84-8油茶母树树冠外围中上部长势良好、腋芽饱满、直径为0.3~0.4cm、健康的当年生半木质化春梢,并修剪成一芽半叶接穗,芽距离接穗顶部0.4~0.5 cm;
S3:接穗的处理:在接穗叶芽下端两侧处削成斜度为25~30°、长1.6~2.0cm平滑的楔形斜面,再将接穗削面置于生长营养液中,25℃黑暗条件下培养;
所述生长营养液配方为:1/2 MS液体培养基+6-BA 1.5mg/L +IAA 0.3mg/L +KT3.0mg/L +创伤酸2.5mg/L +阿魏酸钠 7.0 mg/L +苦参碱0.06g/L +白砂糖25g/L;
S4:嫁接与育苗:将处理后接穗削面插入砧根切口中,与砧根形成层紧密贴合,包扎密封接口处,在温度为25℃、透光度为50%、相对湿度为95%温棚内种植根接苗,保持嫁接口在育苗基质上面,定期浇水,及时除草,每月按100g/株的用量追施一次N、P2O5、K2O质量分数分别为20%、10%、15%的三元复合肥;
所述育苗基质由以下质量份原料于38℃堆肥发酵30d而成:沙壤土200份、蚕沙5份、麦秸30份、油茶壳灰10份、油茶饼粕10份、甘蔗渣8份、菌渣5份、骨粉5份、禽畜粪便25份、功能性微生物菌剂1份;所述功能性微生物菌剂由酿酒酵母菌、哈茨木霉菌T-22、苏云金杆菌、枯草芽孢杆菌按3:2:1.5:1.5的质量比混合而成;
S5:移栽:当接芽萌动至抽出枝梢5cm时,移栽苗圃地。
对比例1:采用普通苗木主干插皮嫁接法
S1:砧木的选择及处理:2月10日,选择长势良好、无病虫害、胸径0.8~1.2cm的油茶树苗,在主干离地10~15cm处切断油茶树苗,并从中间部位纵切2~3cm;
S2~S5操作过程同实施例1。
对比例2:在实施例1相同条件下嫁接赣石84-8油茶树,嫁接方法与实施例1相同,区别在于:未采用生长营养液培养接穗。
对比例3:在实施例1相同条件下嫁接赣石84-8油茶树,嫁接方法与实施例1相同,区别在于:以EM菌代替功能性微生物菌剂发酵育苗基质。
分别采用实施例1、对比例1~3方法嫁接200株油茶,嫁接1年后,计算平均生长指标,结果如表1所示:
表1
嫁接成活率/% 嫁接砧木抽枝萌芽率/% 除萌次数/次 苗木平均生长量/cm
实施例1 99.5 2.5 0 28.4
对比例1 92 69.5 3 26.1
对比例2 86.5 2 0 20.6
对比例3 94 3 0 27.9
由表1可知,相比于传统嫁接法,本发明侧根嫁接法,在嫁接苗生长过程中,显著抑制了砧木萌芽抽枝现象,无需除萌。
尽管本发明的实施方案已公开如上,但其并不仅仅限于说明书和实施方式中所列运用,它完全可以被适用于各种适合本发明的领域,对于熟悉本领域的人员而言,可容易地实现另外的修改,因此在不背离权利要求及等同范围所限定的一般概念下,本发明并不限于特定的细节。

Claims (3)

1.一种油茶根部嫁接繁殖方法,其特征在于,包括以下步骤:
S1:砧根的采集与处理:2~3月,采挖并截取直径为0.8~1.2cm、长度10~15cm的1~2年生油茶侧根作为嫁接砧木,清洗干净,置于生根营养液浸渍处理6~12h后,从截面沿髓心向下纵切2~3cm;
所述生根营养液配方为:1/2 MS液体培养基+6-BA 0.4~0.6mg/L +IAA 0.8~1.2mg/L +NAA 0.5~0.8 mg/L;
S2:接穗的采集:剪取10~20年生、丰产稳产、抗逆性强油茶母树树冠外围中上部长势良好、腋芽饱满、直径为0.3~0.4cm、健康的当年生半木质化春梢,并修剪成一芽半叶接穗,芽距离接穗顶部0.4~0.5 cm;
S3:接穗的处理:在接穗叶芽下端两侧处削成斜度为25~30°、长1.6~2.0cm平滑的楔形斜面,再将接穗削面置于生长营养液中,25℃黑暗条件下培养;
所述生长营养液配方为:1/2 MS液体培养基+6-BA 1.2~2.0mg/L +IAA 0.25~0.5mg/L+KT 2.5~4mg/L +创伤酸2.0~3.5mg/L +阿魏酸钠 5.0~8.0 mg/L +苦参碱0.05~0.08g/L +白砂糖25g/L;
S4:嫁接与育苗:将处理后接穗削面插入砧根切口中,与砧根形成层紧密贴合,包扎密封接口处,在温棚内种植根接苗,保持嫁接口在育苗基质上面,定期浇水,及时除草,每月按80~110g/株的用量追施一次三元复合肥;
所述育苗基质由以下质量份原料于38℃堆肥发酵30d而成:沙壤土200份、蚕沙5~7份、麦秸30~45份、油茶壳灰10~15份、油茶饼粕10~15份、甘蔗渣8~12份、菌渣5~10份、骨粉5~10份、禽畜粪便25~30份、功能性微生物菌剂1~1.5份;所述功能性微生物菌剂由酿酒酵母菌、哈茨木霉菌T-22、苏云金杆菌、枯草芽孢杆菌按3:2:1.5:1.5的质量比混合而成;
S5:移栽:当接芽萌动至抽出枝梢5~6cm时,移栽苗圃地。
2.根据权利要求1所述一种油茶根部嫁接繁殖方法,其特征在于,所述温棚内温度为15~25℃、透光度为45~60%、相对湿度为90~95%。
3.根据权利要求1所述一种油茶根部嫁接繁殖方法,其特征在于,所述三元复合肥中N的质量分数为20~25%、P2O5的质量分数10~12%、K2O的质量分数为15~17%。
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